it is only the skirt that gets coated correct? is it worth it? i knwo i wont be going over 9 lbs of boost, most likely 6 lbs is all ill run. ive also heard of ceramic coating the bearings, any benifit for a daily driver?

 

waste of $ for running relatively low boost. You will see some of guys are running coated pistons because they are pushing the motor hard and high boost. The main reason for coating the pistons because when uder high boost the pistons will get really hot. Coating help cooling down the pistons.



Bruce

 

thank you!

 

When would one deem it being necessary? Also, how much should someone be looking to pay for that?

 

On a 2618 forging, the coating on the skirts is more of a scuff resistor more then thermodynamic advantage as the skirts are subjected to oil which help in cooling the pistons. however on the crowns of the piston the ceramics act as a shield to keep the heat in the combustion event and let more of it go out the exhaust rather then being absorbed into the piston and transfered through the rings to the cylnder walls for the cooling system to dissipate. in a turbocharged system this help minimally to create a quicker spooling condition by using the heat energy in the exhaust rather then wasting it in the cooling system and raising operating temps.. hope this helps.. but in fact it is an advantage in any given motor but the process is simply too expensive for an OEM manufacturer to add it to a production engine.

Chris

 

Is there ever a chance of the coating flaking off?

Has anyone seen an advantage to cryo-treating as well?

 

there is always a chance of the ceramic coating flaking off, but that will primarily depend on the coating process and how well the base item being coated is prepared for the treatment.

as for cryotreating , yes this is also a very good way to strengthen parts, it supercools the metal causing the molecules in the metal to pull tightly together and this helps to better align the moleculor structure of the parts material composition. it is almost like forging but using temperature to create the internal pressure rather then an outside source such as done in the archaic days when they heats the material and pounded it to compress the molecules into one another making the steel denser and more aligned.

modern day forging uses larger machines to compress the material during certain stages of the manufacturing process, this is how you add the strength to the part. also adding/mixing alloys will give the metals some exceptional properties that will better suit them for their intended purpose.

hope this helps!

Chris

 

What are the chances of ceramic coating damaging the engine after flaking off?

 

I doubt it would do any damage to the internals on the motor. Probably just get spit out the exhaust. Not sure what it might do to the turbine in a turbo though. If it didnt get caught in the bearings, it would probably just go right out the downpipe...

 

If the skirt coatings flake, it would probably end up in the oil pan. If the face coatings get hot enough to flake off, you have bigger problems.

http://www.swaintech.com/

 

the coating isnt too expensive.
there are a few threds about coatings you can find by doing a search. www.polydyn.com is who i used.
coated the piston tops, skirts, head chambers and valve face and exhst ports.
as for cryo treating, ive had basicly all transmission parts done, rotors, and valve springs.

if you only plan to run 6psi coating the pistons isnt needed but wont hurt.

brook

 

Sounds like a plan, the only thing is chances are your pistons will get covered in carbon anyways, but yes it's mostly just good to keep the head in the chamber, I don't see it being a great thing to be honest, considering your spark plug with it's sharp tip will most likely be the first thing to create a hot spot.

 

Do you think they would have a problem coating those same parts on my heads if they are already assembled, or is that how yours was done?

 

i dont remember if i took mine assembled or not. id call or email them and ask them.

 

I'll try to get a hold of them this week. Thanks.